Variable-speed mechanism.



l. ARNOU VARIABLE SPEED MECHANISM.

APPLICATION YILED MINE H, 1914.

Patented Muy 28, i015.

l: SHEETS SHkET 2.

J. ARNOT. VARMBLE SPEED MECHANISM.

APPLICATION man JUNE a. 1914.

Patented May 28, 1918,

6 SHEES-SHEET 5.

BY u// A TTORNE YS.

J. ARNON,

VARIABLE SPEED MECHANISM.

APPLxcATlou min :un: s, |914.

' 1,267,619. Patented May28,191&

i SHEETS-SHEET 6.

l 1 my? wfswnm/ f4 ATTORNEYS.

nso

JAMES ABNOTT, 0F OAKLAND, CALIFORNIA..

VARIABLEJSP'EED MECHAI'ISM.

Bpecication of Letters Patent.

Patented May 28, 1918.

Application led .Tune 8, 1914. Serial No. 843,628.

T o all whom. z't ma( `conce/m.'

Be it known t at I, JAMES AnNoT'r, a citizen of the United States, and aresident of Oakland, county of Alameda, and State i of California, haveinvented certain new and useful Improvements in Variable-SpeedMechanism, of which the following is a specification.

The invention relates to a mechanism for producing different speedratios of rotating elements.

One of the objects of the invention is to provide a variable speedmechanism which will transmit motion positively at all times, includingthose periods of time during which the speed ratio is being varied.

Another object of the invention is to provide a positive drive variables eed transmission having a direct drive on igh speed.

A further object of the invention is to provide a positive drivevariable speed transmission which is provided with a reversingmechanism.

The invention possesses other advantageous features, some of which, withthe foregoing, will be set forth at length in the folowing description,where I shall outline in full that form of the invention which I haveselected for illustration in the drawings accompanying and forming partof the present specification. In the drawings I lhave shown one specificform of my generic invention and several modifications of various partsthereof, but it is to be understood that I do not limit myself to theforms shown, because my invention may be embodied in a multiplicity offorms, each being a species of my said invention. The transmissionmechanism of my in vention is particularly adapted to be used on motordriven vehicles and the specific form shown in the drawings isconstructed with that purpose in view, but it is to be understood thatthe invention is not limited to such use, but may be employed in allinstances where variations in speed ratio of driving and driven elementsare desirable, r in other words, wherever speed changing gears areemployed.

Referring to the accompanying drawings: Figure 1 is a plan or top view0f one form ofthe variable speed mechanism of my invention, severalV ofthe parts being shown in section to better illustrate the construction.

Fig. 2 is a vertical section through the mechanism of my inventionshowing the gear train.

Fig. 3 is a plan view of the connecting gear mounting, a portion of theconnecting gear shaft being broken away and the driving gear beingremoved. V

Fig..4 is a perspective view of the driving gear and connecting gearmounting.

Fig. 5 is a perspective view of the guide plate and positioning meansfor the connecting gear.

Fig. 6 is an end elevation, partly in section, of the cam for moving theconnecting gear transversely, the slide carrying the cam engaging pinsand'coperating mechanism, the arrangement of the pins being amodification of the arrangement shown in Fig. 1.

Fig. 7 is a plan of a fragment of the face of the cam showing the meansfor preventing the improper seating of the pin.

Fig. 8 is a side view of the pin carrying slide.

Fig. 9 is a sectional detail showing the positioning of the pin in theslide.

Fig. 10 is a fragmentary cross section of the cam showing the groovetherein at its spiral portion.

Fig. 11 is a similar cross section showing the groove at its annularportion.

Fig. 12 is a plan view artly in section of the rods for reversing t emechanism and disengaging the variable speed gears from the drivinshaft.

Fig. 13 is a plan view of the slotted plate below which the rodsA aredisposed.

Fig. 14 is a section of' the slotted plate and the lever for operatingthe rods, taken on the line A-A Fig. 13.

. Fig. '15 is a section through the cam and slide, the section beintaken along the line of the groove at the le t of the cam shown in'lFi 1. Fig. 16 is a plan vieviI of a mddified form of means for shiftingthe connecting ear. y

' Fi 17 is a plan view of a modifi form 1oit' mounting for the drivingand connecting gears.

Fig. 18 is a detail of the means employed for holding the connectinggear in position in the construction shown in Fig. 17.

Fi 19 is a modified form of variable spee mechanism.

Fig.` 2Q is a cross sectiony of the construction showninFig. 19, takenon the line vov B--B Fig. 19, the figure being turned on its side.

'The construction shown in Fig. 1 comprises a driving shaft 2 which isconnected to the engine or prime mover and which is provided at its end3 with a seat in which the forward en d of the driven shaft 4 isrotatable. Rotatably mounted on the driven shaft 4 is a sleeve 5 uponwhich is secured the variable diameter gear 6 and the shifting cam 70.The ear 6V comprises a plu ra ity of cylindrica or concentric gearelements 7, 8, 9, and spiral or eccentric gear elements 12, 13,*whichare interposed between the cylindrical gears, which are of suchprogressive increase or decrease in diameter that each spiral oreccentric gear forms a contlnnous ascending or descending gear segment,springing from ythe side of one cylindrical gear at a given point andmer ing into the next gear in a direction whic is the resultant of Vacircular movement about the axis of revolution and a longitudinalmovement along it. The spiral or eccentric gears 12-13 are complete in'circumference and each gear progresses in opposite directionscircumferentially from' one cylindrical gear to the adjacent cylindricalgear, thereby forming `a complete path upward or downward on gear 6regardless of the direction of tation of gear 6. The teeth in thecylindrical gears and the spiral segments are pa'allel with each otherand with the axis of rotation and at the junction of the cylindricalgear and spiral gear the teeth are prolonged or extended, so that at thezone of juncture the teeth are common to both gears. The oppositelydirected segments of the spiral gear spring from the cylindrical gear atpoints spaced apart, s that the spiral gear segments cross each other atthe zone 'of juncture with the cylindrical gear, the outer ed e of onesegment merging into the cylin rical gear 'at the point at which theinner edge of the op ositely directed segment springs from y hecylindrical gear.

Engaging the ment with either of the different diameter cylindricalgears 7, 8, 9. The connecting gear 14 travelsfrom one cylindrical ear tothe next over the spiral segment, cit er asca and that the radius ofthev spiral gear .width as teeth of gear 6 is a con-4 necting gear14which isunovable longitudinally so that it may be moved into engagedoesnot begin to vary untilafter the spiral gear has completely departedfrom the cy lindrical gear.

The connecting gear 14 is movable laterally as Well as longitudinally tocompensate for the different and varying diameter? of the gear elementsforming the composite gear 6. The gear 14 is mounted for rotation on thetransversely movable shaft 15, which is supported in the arms 16 whichare in turn ]ournaled on the eountershaft 17. Secured to thecountershaft between the arms 16 is a cylindrical gear 18 with which theconnecting gear 14 meshes. The driving gear 18 may be of a length equalto the length of the com osite gear 6 and thq gear 14 may be mova lelongitudinally of the gear 18, or the gear 18 may be of the same ear 14and be movable longitudie shaft 17 in time 'with the movement of gear 14as shown in Fig. 17. The shafts 15 and 17 are parallel so that ars 14and 18 are always properly meshe regardless of the transverse potion ofgear 14 with respect to the axis of gear 6.

The arms 16 comprise a portion of the rocking frame 19, which isprovided below the shaft 17 with a plate 21 curved concentrically with-r ect to the shaft 17. The plate 21 is rovi ed with a longitudinahslotnally of t `22 arrange parallel to shaft 17, the function of which wilbe hereinafter described. A1'- ranged below the late 21 is a fixed plate23 concentric with p ate 21which plate 23 is provided with a slot 24`having parallel to slot 22 and portions inc ined t0 slot 22. Theseslots 22 and 24 act as guiding and holding means tolmaintan the gear 14in the proper pitch relation to the various'gear segments on compositegear 6. The gear 414 is. provided with an annularly grooved hub 5, whichis rotatably engaged y an arm 6, which is provided on its lower end withtwo axially ali ed rollers 27-28 or a, sin le roller havingircumfereutial faces of different diameterst #The slot 24 `is wider thanslot 22 nd the lar r roller 27 engages in,slot-24 anad "the srna erroller 28 engages in slot 22 in the rocking' frame which carries shaft15. The slot in t e plate 21 is preferably formed narrower than the slot24, to prevent the rollers 27-28 from being lifted from the slots.' -Theparallel ,portions .of slot 24 correspond in extent to the parallelmovement ofgear 14 onto and oil' of the cylindrical gear elements 7, 8and 9 and the inclined portions of the lslot correspond to the movementof the gear 14 'over the spiral portions of gear se ments 12 and 13. sthe gear 14 is moved ongfitudinally,

the roller 27, moving'in time therewith along the fixed slot 24V causesthe frame 19 to be rocked, eleva'tin v or depressing the gear 14 asitpro ressesglongitudinally so that it is always he d-in the properpitch relation with ortions the component gears on gear 6. The arm 26and its cooperating parts also operate to hold the gear 14 in mesh withthe component ears of gear 6, when the direction of rotaion of gear 6 issuch that the forces at the contacting teeth tend to push gear 14 out ofengagement with gear 6, The rocking movement of frame 19 about shaft 17,upon which it is journaled is, therefore, produced by the longitudinemovement of the connecting gear and the rockingof the frame is in timewith the progression of the gear 14 along ear 6. I the gear 6 had amotion always 1n the same direction and was not reversible, there wouldbe no tendency to push the gear 14 out of mesh, in vwhich case the plate21 could be dis ensed with and the arm 26 used only to old the gear` 14in its proper pitch relation, or if this were considered not essential,the arm 26 and its coperating parts might be dis ensed with.

In ad ltio fore described, means are provided for controllin thelongitudinal movement of the ear 1 and also for moving it in time withhe revolution of gear 6, so that the ear 14 will always be maintainedcontinua y and properly in mesh with gear 6, both when engaging thecylindrical gear elements and when taveling over the spiral gearelements. This 1s accomplished by means of the shifting cam 70, securedto the sleeve 5 and rotatable with the composite ear 6. The camA 70 isprovided with two elical grooves or actuating surfaces 231-32, thegrooves being oppositely directed, so that as the cam revolves, onegroove progresses to the right and the other to the left. In the furtherdescription I shall assume that the gear 6 "and cam 70 rotate normallyin a clockwise direction when viewed from the right, `that is, that theforward surface of the .cam is moving upward. When the directlon ofmovement of the vehicle or other applied a paratus is reversed, the camwill according y revolve in a counter-clockwise direction. Under thenormal conditions of operation, the groove 32 progresses toward theright and the groove 31 to the left. The grooves `are helical, except attheir ends where they terminate in circular or straight portionsl, 31",32, 32", and at the straight portions, the bottom of the grooves areeccentric to the axis, so that at the ends, the grooves terminateon thecircumference of the cam. The straight portions 31a, 32,` lie adjacenteach other at the center of the cum, and the straight portions 31", 32are disposed at the opposite ends of the cam. y

Arranged adjacent the cam is a slide 33 mounted in a fined fname 34, theslide being provided with pins 35-36 37-38 adapted to be seated in thegrooves. It is evident that when the proper pin is moved into enn to t eguiding means, hereto,

gagement with the proper groove, that the slide is moved longitudinallyin time with the progression of the groove. The slide is suitablyconnected with gear 14, so that the gear moves longitudinally in timewith thc slide` in the construction shown in Fig. 1 the connecting meansconsisting of a link 39 attached at one end to the slide and at theother end to the arm 26. In the present construction I have shown threecylindrical gears 7, 8 und 9, the helical portion of earn groove 31serving to move gear 14 from engagement with gear 9 into engagement withgeur 8 and from gear 8 into engagement with gear 7 and the helicalportion of cam groove 32 serving to move gear 14 from engagement withgear 7- into engagement with ,gear 8 and from gear 8 into engagementwith gear 9. It follows, therefore, that the slide 33 moves to the leftof its throw in two equal steps and moves to the'right of its throw intwo equal steps. Pin 38 moved into engagement wlth groove 32 moves theslide to the right, the distance between grooves 32"i and 32b and isexpelled from groove 32b by the eccentric portion thereof, in which thebottom of the groove merges into the face of the cam. Gear 14 is then inmesh with gear 8, and pin 37 registers with groove 32, and pin 36 withgroove 31a. If the pin 37 is then moved into groove 32, the slide ismoved an' equal distance to the right,H bringing pin 35 into registrywith groove 31n an gear 14 into 'mesh with gear 9, provided the gearcomponents of gear 6 are correctly placed in relation to the grooves onthe cam and that the connecting means between the grooves and gear 14are properly arranged. In passing gear 14 from gear 9 to gear 8 and romgear 8 to gear 7, the same equal steps are produced by moving pin 35into groove 31 andfafter the step has been com leted by moving pin 36into groove 31. he pin is moved into and out of the groove at thestraight or circular portions, and is lnoved longitudinally by contactwith the elical groove or actuating surface.

The position ofthe pins 35`-36-37-3,8 with relation to the oves 3 1-32and the position of gear 14 wlth relation to the com- ;ponent paris ofear 6 must he such that the gear 14 is move in time with the spirals 12;

and 13 and in proper engagement therewith.,

Since the ear 14 moves transversely with` respect to t e axis of gear 6,its position of engagement with the gear 7, 8 and 9 varies, that is,when the gearvv 14 is in engagement with gear 9 it is relevated and when1t is in enga ement with ear 7 it is depressed and lies c oser to ahorizontal plane through the axis of gear .6. For this reason a givenpoint on gear 7 will come into enga-gement with gear 14 sooner than acorresponding point on gear 9 would. Hencedf the points of juncture ofgear 12 and gear 8 were in the saine position relative to a planeassinglongitudinally through the axis of t e gear 6 as the points of junctureof gears 13 and 9 and the pins 35-36 or 37-38 were set the same positionwith relation to the y ,sition of the cam grooves 31-32, the ear livouldnot mesh properly with gears 1 or 1 This variation, due to thetransverse movement of the gear 14, may be overcome by arranging thepins in each pair (pins 35 and 36 con stituting one pair and pins 37 and38 constituting the other pair) at different angular positions withregard to the cam grooves, or y shifting the position of the spiral gear13 with relation to spiral gear 12. It4 is understood that thelpositionin of the spiral gears is determined before t e gear 1 6 is constructed. In the construction shown in Fig. 1 I have shown the point ofjuncture of gears 9 and 13 set back slightly with respect to the pointof juncture o gears 8 and 12 the position of the cam-groves will be thesame when gear 14 is at the juncture point on ar 8 or v hould thecomposite gear be formedso that the points of juncture of thecylindridal and spiral gears are alined, the pins in l the slide 33should be arranged so that the gear 14 `inoves in proper mesh and intime with the spiral gears. This may be accomplished by placing pins 36and 38 at lowerlevelsthan pins 35 and 37 respectively so that they willengage the spiral portion of the cam "ooves -in advance of the pins 35and 37, t ereby causing the longitudinal movement of gear 14 from gear 8to gear 9 d vice versa, to be slightly in advance o e movement'from gear8 to gear 7 'and vice versa, with relation to the position of the oov'eson the cam. This positioning of't egiins in. the slide is lshovvn inFigs. 6 and the pins being arranged radially with respect to the cani.

The grooves 31-32 are formed at their spiral or actuating ortions withan over- 38 are provided at their heads with a lateral projection 42which engages under the overanging edge and locks the pin in the groove.The base of the groove is of the same width throughoutits lengthand the.

, he pinis moved intothe groove atiits L strai ht portion and must bemoved sufiilcient y into the groove atthe time that the beginnin of thes iral portion approaches so that t e in w11 not 'be sheared olf ormutilated. he leadin end of the pnwill probably be sheared o ormutilated if the pin is only partly entered int? the groove so thatnee'ageipL oove,

that it will not have sulcient time to be y properly seated before it.inoves rinto the spiral portion of the oove.

Arranged flush wit the surface of the cam 7 and overlying the groove atthe juncture of the straight intake portion (31, 32') with the spiralportion o the groove is a guard plate 43, which is pivoted at one end sothat it may be moved from over the groove. The guard plate is normallyheld in position by a s ri 44 and when moved from the groove ies in acavity or depression 45 in the face of the cam. 4 The guard plate is ofsuch length and isso placed, that if the pin is started into thegroovebefore the ard plate comes around, there is suicient time for thepin to seat in the groove before the spiral ortion of the groove isreached and the pin in the groove moves the guard late to one side,Should the pin be mov toward the groove after the critical osition ofentry has passed, it contacts with the surface of the guard plate andisprevented from entering and when the guard plate has moved out fromunder the pin, the spiral portion o'f the groove has begun, the in nolonger registers with the groove an Acannot be moved into the groove. Bythis arrangement I insure the movement of the pin into the groovesuioiently in advance of the approach of the spiral portion to allow thepin to become sufiiciently seated in the groove so that the j leadingend thereof will not be sheared off or mutilated bythe spiral portion ofthe groove.

The body of the pin .at its head portion is rounded, so that it readilypasses along the spiral ortion of the groove and the diameter o therounded portion is slightly less than the width of the face of thespiral portion ofthe groove. .The shank 46 of the pin is square andengages in a square aperture in the slide 33, so `that the pin is Vnen`rotatable and the luga-2 always seats 'ist isi: the overhan g edge 41when the pin is seated in t e oove, thereby positively 'looking the pin1n the spiral portion of the oove;` The bottom of the straight portion31, 32" of the groove is eccentric. to the axis of t e cam andterminates at the sur- 'face of the cain, and as the pin rides up' onthis eccentric portion it is expelled from the groove. e bodyf rtion ofthe pin is provided with abeve ed notch 47, Which is adapted to be engaed by a beveled spring pressedlatch 48 re erably arrangedlwithin theslide 33.y As the pin is expelled Yfrom is moved toward a pin,

57v'hen it becomes aline means which will hereafter be `oted at one endto iiiova ble the groove, the latch 48 moves into the notch 47, drawingthe pin to its seat in the slide and lockin itin such position.

Since the inta e or entrance portions 31, 32', of th each other at thecenter of the cam, the means for moving the pins into the grooves needonly be arranged at that place. The pins are moved into the grooves bymeans of a lever 49 pivted at 51 to some fixed part of the vehicle orstructure upon which the transmission mechanism is arranged. The pivot51 is arranged parallel to the slide 33 so that the lever may be rockedin the direction of the length of the pin to in ove thea pin into thegroove. Since 'the grooves 31a' and 32la are spaced from each other, andthe lever is tov be employed nfor moving a pin into either groove, thelever is jointed at 52 so that its upper portion which contacts with thepins may be rocked sidewise, to bring it into line with the desired pin.The upper portion of the lever 49 is preferably held upright at thejoint 52 by flat springs 53fsecured to the lower portion 54 of the leverand bearing against the upper portion. The lever is returned to itsnormal backward position, away from contact with the pins, by the spring55 bearing against the fixed frame 34. It is under stood that any othersuitable means may be employed for moving the pins into the grooves...

employed for locking the slide against movement when it is not beingshifted by the cam and for releasing the slide prior to the insertion ofa pin in a groove. Pivotally attached to the frame ,34 is a bent lever56 whichis loosely pivthe lower portion 54 of the lever. The other endof the lever 56 is adapted to seat in cavities or depressions 57 in theslide, there being one cavity for each position of the slide. As thelever 49 the lever 56 is rocked on its pivot and withdrawn from thedepression before the pin is moved into the groove, and the lever 49being released, the lever 56 drops into the a proachin cavity d)therewith.

In Fig. 1, I have shown the link 39 connectging the slide 33 with thelongitudinally gear 14, and in Figs. 16 and 17 I have shown other formsof connectin describe When the link connection shown in Fig. 1 isemployed, provision must be made for the various inclinations of thelink in the different positions of the slide, due to the 60 differencesin elevation of gear 14. The

$5 to gear 8 being slide 33 moves in each direction in two equal sli-ps,but on account of the varying inclinatiqguijlthe link 39, the gear 14docs not move in equal steps, the step from gear 7 longer than the stepfrom e grooves are arranged adjacent A gear 8 to gear 9. When the link39 connection is used. therefore, tween gears 8 and 9 is slightly lessthan the distance between gears 7 and 8.

In the construction shown in Fi 16 the gear 14 moves to the right or lct of its throw in two equal steps so that when this construction isused, the gears 7, 8, and 9 are equally spaced. In this construction theshaft 17 1s extended and is provided with a loose collar 58 which isattached to the slide 33 by the arm 59, so that the collar moves lon'tudinally of the shaft 17 in time with the sllride. The gear 14 and thecollar 61 are rotatably mounted on and slidable longitudinally on shaft15, and the arm 26 which rotatabl y engages the collar 61 is connectedto t e collar 58 by a rod 62, which is rotatablyV attached to collar 58.

In the construction shown in Fig. 17 I have shown a modified form of thestructure shown in Fig. 1, in which the gear 63 movable along shaft 17in time with gear 14, is substituted for the long drivin gear 18, andinstead of moving gear 14 with respect `to gear 18, the gear 63 ismovable longitudinally with respect to its shaft 17.

he shaft 17 is formed square and the interior of the hub 64 of gear 63is similarly formed, so that the gear rotates with the shaft. Journaledon the hub 64 are arms 65, corresponding to arms 16, in which the shaft15 of the gear 14 is mounted. The hub 64 is provided with an annulargroove which is rotatabl engaged by the arm 66 secured to the sli e 33,so that gears 63 and 14 move in time with the slide. In thisconstruction the frame 19 may be dispensed with and the fixed plate 23with its irregular roove. alone employed. The roller 67 on t e lower endof arm 26 kis preferably, though not necessarily, ianged. The arm 26holds the gear 14 from being moved out of mesh with the gear segments oncomposite gear 6 when the direction of rotation of gear 6 is such thatit tends to force the gears apart.

Normally the direction of rotation of the gears 6, 14, and 18 (or 63) issuch that the gear 14 is held in engagement, but I have provided meansfor reversing the direction of rotation of the parts and during the timeof rcve'rse movement, the gear 14vshould be held in mesh. Non-rotatablysecured to the drive shaft 2 and spaced from each other a suitabledistance, are two clutch members 68 and 69, the clutch member or collar68 being movable longitudinally of the shaft.`

Arranged between the clutch member 69 and the colar 68 on the shaft, is'a rotatably mounted hub 71 t0 which is secured a gear 72, the earpreferably being formed integral with the hub. The hub 7l isprovided onils opposite faces with clutch members 73 and 74 which are arranged tocnthe distance be` nected to gage respectively clutch member on collar68 and clutch member 69. The collar 68 is provided with a clutch member75 on one end and with another clutch member 76 on the other end. That6portion of the shaft 2 on which the collar 8 slides longitudinally ispreferably square and' the bore of the collar is square so that thecollar rotates with the shaft. J ournaled on a xed bearing below gear 72is a gear 77 which meshes with gear 72 and is continually in mesh withgear 78 fixed on the 'shaft 17. With the various gears in the positionshown in Fig.'1, the gear 6 rotates in the same direction as drivlngshaft 2. Secured toshaft 17 adjacent gear 7 8 is a gear 79 ofslightlylarger diameter than gear 78, which when engaged by gear 72causes av reverse movement 'of the gear 6. 4"When the hub 71 is movedlongitudinally of the shaft to eectjthe reverse rotation, clutch member73 irstadisengages clutch member 75and gear72gdise ges le'ar 77. In thisneutral positiort, th'e rive aft 2 is out of connection with shaft 17and motion is not imparted thereto., A further movement of the ub 71 tothe right causes ear 72 to enga ear 7 and then moves c utch member 4into engagement with clutch, member 69. rlhegear 2,therefore, has threeositions, via, forwarddrive, neutral, an reverse drive. The a greaterdistance4 than the width of gear 72 and clutch members 74 and 69 a're soar ranged that"the gears 72 and 79 become initially engaged before theclutch members become engaged. The means employed for shifting the hub71 and locking itA in its shifted positions willv hereafter be described. With the parts in the position shown in Fig. .1, power istransmitted from the driving shaft 2, through the collar 68 to gear 72,whence it passes through gears 72 and 78 to shaft 17, carrying the gear18. From gear 18, power is conveyed through gears 14 and 7 to the sleeve5, which is ,con-

the driven shaft 4 through the meshed clutch members 82-83. The ratio ofspeed between shafts 2 and 4 depends on the position of gear 14 withrelatonto the composite gear.

Secured to the driven shaft 4' adjacent to shaft2 `is a. clutch member81 which is adapted'to be enghaged by clutch member 76 en -collar 68, Wich enfgaging o eration locks shaft 2 to the sha t pro ucinga directdrive. The gear 6 and cam 70 are secured to a sleeve mounted on shaft 4,which, when the transmission is operating other than on direct drive, isconnected to the shaft by means of the clutch members 82--83, clutchmember 82 being formed on the sleeve 5 and clutch member 83 being on thecollar 84, rotatable with and movable longitudinally with respect toshaft 4. Col- 4When. in such 70 are 'rotating lars 84 and 6,8 aremovable together and for that. urpose are rotatablyx engage by a rod 85,w ich is rovided wit `means for moving it into iierent positions andlocking 1t 1n such positions.

When operating `on membersSl on the driven shaft and driving shaft arein engagement and clutch members 82 and 83 are separated. The sleeve 5and the parts carried thereby and their associated mechanisms are thennot in operation since clutch members 73 and 75 are also separated. v

The amount of overlap or engagement of clutch members 82 and 83 is lessthan the amount of overlap of clutch members 73 and 75, so that theclutch member 83 may be moved out of engagement with the sleeve directdrive, clutch 5 before gear 72 is released from shaft 2.

osition the gear 6 and cam ldly and the gear 14 may be shiftedlongitudinally of gear 6, allowing the ear ratio to be changed AwhilethtJ vlvehic e or other mechanism is stationary.

ears 78 and7 9 are spaced apart' driving shaft A further movement of'collar 68 to the left moves it out of enga ement with gear 72, or into aneutral position, in which thc motion of the driving shaft is notcommunicated to gear 6 and its cooperating elements. A further movementof collar 68 to the left engages clutch members 76 and 81, causin thedriven slat 4 to rotate in unison witg A controllable friction clutch 86is arranged between the engine and other mech anism being driven and ispreferably arran on that si e of thetransmission` mec anism remote lfromthe engine, although it may be arranged between the enne andtransmission.

The hub 71, carrying gear 72, is movable longitudinally by means of therod 87 and collars 68 an 84 are movable longitudinally by means of rod85. I have provided a single lever 88 for moving either of these rodsand have also provide means for locking the rods in their various'ositions. The structure of the rods. and. eir operative means is shownin detail in Figs. 12, 13 and 14. The rods are s aced .apart from each'other, and each ro to its end with late ly extending lug and 87, thelugs lying on adjacent sides'` of the rods. 85" and 87", which ispressed inward by means of a dat s rin 8587 attached to the' respectivero s. bove the ends of the rods is a stationary ide plate 89 havin an aerture or slot t erein, through whic the ever 88 passes. on its underside with a spending lu 91, which occurs between the lugs 85 an 87 andwhich is rovided on opposite sides with seats, in whic the bolts 85 and87b respectively seat.

is provided adjacent Arranged in each lug is a bolt,y

The latis provided las It is evident that when the bolts `to theconcentric gear.

seat in the lug 91, that the rods and their associated clutch membersare locked against movement.

The lever 88 is double jointed so that it may bc moved both sidewise andbackward and forward, and is rovided with an elongated slot' 92 which,in the sidewisc movement of the lever, enga es the pins 8587f1respectively on the ro s. Se cured to each bolt 85"---87h is a piu 85E-87e which is movable in a slot in the lugs 85th-87at and which lies inthe path of t e lever 88 in its sidewise movement. When thel lever ismoved sidewise, for instance, toward rod 85, it engages pin 85dl and pin85", pushing bolt 85h out of engagement with lug 91, thereby unlockingthe rod, so that it may be moved longitudinally. Means are also providedfor locking the rods to hold their associated hubs and collars in any ofthe various positions. The lever is provided with a grip-operated latch93 which is adapted to seat in depressions or notches in the plate 89,the notches 94, 95 and 96 cor- `responding to the three positions ofcollar 68 and the notches 97 and 98 corresponding to the two positionsof hub 71 these various positions being additional to the positions ofthe parts in Fig. 1

In Flgs. 19 and,20, I have shown a modiY fied form of change speed gearand its associated cams,- 'the remaining portions of the completeapparatus being substantially the same as that shown in Fig. 1. In thismodified construction the composite e'ar and cams are mounted on asleeve on t e driven shaft 4, to accomplish the direct drive and thesame clutches and reversing mechanism are employed. 'l'he composite gearcomprises a plurality of concentric gears 101- 102-103, of differentdiameters, which are spaced apart by eccentric gears 104-105 ofdifferent diameters. The eccentric gears 104 and 105 are coincident atdifferent portions of their perimeters with the perimeters of theconcentric gears, that is, the-teeth' o gear 104 are alined at oneportion with th teeth on gear 101 and 4at another portion with the teethon ear 102 and the teeth on gear 105 are aline at one portion with theteeth on ear 102 and at another portion with the teet on gear 103,Between these coincident or concentric portions, the eccentric gear hastwo eccentric portions which connect the concentric portions of itsperimeter,` one rising from the Smaller gear to the larger and onefalling from the larger gear to the smaller. The intermediate gear 14 ismoved longitudinally of the axis of the composite gear at the zones ofcoincidence of the eccentric and concent 'c gears, both from theconcentric to the eccentric gear and from the eccentric 0n account `ofthe fact that gear 14 is not simultaneously moved longitudinally andtransversely as in the former construction, the slot 24 in plate 23 isformed with portions at right angles to each other. The shaft 15, uponwhich is mounted the gear 14 and its grooved hub 25, v

is supported in thc arms 106, which are rotatably mount-cd on shaft 17.Rotatably secured to the hub 25 is an arm 107 which is mounted on thesleeve 100 arranged on the shaft 17, whicharm operates to move the ear14 longitudinally in time with the s ceve.

Secured to the sleeve `5 is a cam 108, which serves to hold the gear 14in mesh with the composite gear and also to move gear 14 to the left,the cam being arranged to move the ear 14 from one concentric gear overthe intermediate eccentric ear, to thc next concentric gear in and at te proper time. The cam has two concentric plortions separated by aneccentric portion, t e parts bemg arranged in the same relation as theconcentric and eccentric gears on the composite gear. undercut groove109, rogressing toward the left and having stralght and helical portionsto effect the pro )er longitudinal movement of the gear 14. Iounted onsleeve 100 and secured to arm 107 is an arm having two fingers 112-113,the ends of the fingers being spaced apart a distance equal to thedistance between the center lines of two successive concentric gears,and the finger 113 being depressed below finger 112 for reasons whichwill hereinafter appear. In the end of each finger is a pin 114-115, ofthe same construction and mounting as the pins 35, etc., in slide 33.When pin 114 is moved into groove 109, the rotation ofthe cam causesgear 14 to be moved from gear 101, over gear 104 to gear 102. ,Thegroove 109 has t e same overhanging ledge as groove 31, so that the.vpin is locked in the groove, and the bottom of the groove at itstermicam, sq t at the pin is ejected from the groove, and is alsoprovided with a guard plate which prevents the improper entrance of thepin. The movement of the gear 1 4 to gear. 102 brings the pin 115 infinger 113 into alinement therewith, and the movement of the ear 14 romgear 102 to ear 103 is affecte b mo ing the pin 11 into the grolove Vhenthe gear 14 is in engagement witi tient at it occupied when in mesh withgear 101V and this elevating movement correspondingly elevates thefinger 113, so that such fingerA must berdepressed below finger 112. Thefingers 112-4113 contact with cam 108 on the opposite side of the' axisto which gear 14 is disposed, so that should there be any tendency tomove gear 14 transversely out of mesh, such movement will be preventedby the fingers contacting with `the f face of the cam 108. Since thegear 14 is in Formed in the face of the cam is an nation slo es outwardto the surface of the ar 102, it is elevated over the posii relativelyspeaking a di'erent position with relation to a horizontal plane throughthe axis ofthe coinposite gear vwhen in mesh with ears 101 and 102, thezone of coincidence o the concentric and' eccentric gears will reach thegever 14 later, relatively speaking, when it is in mesh' withgearilfthanwhen it isin mesh with gear 101. t In order to effect the propermovement ofgear 14, therefore, 102, the Vpin 115 is advanced so that itwill,

engage the helical portion of the groove 109 sooner than pin 114.

In ctfecting'the longitudinal movement of gear 14, the cam` 108 operatesonly tomove the gear 14 from right to left, and the cam 116, secured tosleeve 5, is employed for moving the gear 14 from leftto right. The cam116 is `provided with a groove 117, of the sameconstruction as groovel3l, which has straight and helical portions corresponding to therequiredfmovement of gear 14, and is alsoprovided with a guard plate forpreventing the improper entrance of.A the pin. Arranged adjacent cam 116is a 'slide 118, in which are mounted e(pins 121-122, which are adaptedtobe mov into groove 117 and which are of the same construction andarrangement as 4pins 35 and 36 in slide 33. The pins are -placed atdifferent` levels for the same reason as pins 114-115. The slide 118 isconnected to sleeve 100 in such manner that the movement of the slideproduces `a longitudinal movement of the gear 14. When gear 14 is inmesh`with gear 103, pin 122 is alned with the intake end of groove 117and when the pin is moved .into the groove, the gear is moved to gear,102 and pin 121 becomes alined with the intake portion of the roove. y

For the sa e of convenience in operation,

I have provided one lever 123 for operating the pins 114-115121122. Thelever is arranged adjacent slide 118 at the intake endof cove 117 and ismounted 'on a fixed brac et 124 and is provided with a transverse joint125, so that 1t may be moved sidewise and back and forth. Mounted onthe' bracketL` Y 124 is a lever 126 having its upper end lying` whenitis moved to in the ath of the lever, one si e, the pins 121 or 122lyin in its path when itis moved to the other si e. Loosely connecidtolever 126 is a lever 127 secured to a shaft 128 `journaled in a fixedbracket 129. The sha 128 extends longitudinally to the intake side ofgroove 109, and at that point an arm 130 is secured thereto, the armhaving a broadened head 131 so that lit may ,engage the pin 114--115vwhich is in position to be moved into the slot.

I claim: i f,

1. In a variable speed mechanism, a driving shaft, a driven shaft, gearconnections including a. com osite gear composed of alternate concentricand eccentric gears between said shafts, means for releasing said fromgear p ing t directlycoupling nectin connections, and means for directlycoupling saidshafts.

2. In variable speed mechanism, a driving shag., a driven shaft, acomposite gear composed of alternate concentric and eccentric gearssecured to one of said shafts, gear connections between said compositegear and the other shaft, and said composite gear from the it ismounted.

3. In a variable speed mechanism, a driv' shaft, a driven shaft, acomposite gear composed of ,alternate concentric and eccentric gearsmounted on one of said shafts,

ear connections between said shafts including said composite gearadapted to vary the speed ratio'of said shafts, means for releasshaft onwhic means for releasn ing saidl'gear connections and .means for'.

said shuil 4. In `a variab e speed mechanism, a drivmg shaft, adrivenshaft, a sleeve mounted on que of 'said shafts, a composite gearcomposed of r connections between said shafts, an

is moun Y t 5. In a variable speed mechanism, a driving shaft, adrivenshaft, a composite gear composed of alternate concentric andeccentric gears mounted on one of said shafts, gear connectionsincluding said composite gear between; saldiy shafts, meansrford1sconsaid composite gear from the shaft onlwlnch it is mounted, anmeans for disconnecting the other shaft `ffromy said compositegear.

6. In a variable .speed mechanism, a driving shaft, a driven shaft, acomposite gear composed of alternate concentric and eccentric gearsmounted on one of said shafts, gear connections including 'saidcomposite gear between said shafts, and means for versing the directionof rotation of said composits gear.

7. In a variable speed mechanism, a driving shaft, a driven shaft, gearconnections inclu g acomposite gear composed of al-V means for' lockingsaidlsleeve to the shaft on Iwhich it alternate concentric and eccentric.'grs socllred'to said sleeve,

ternate concentric and eccentric gears arranged between said shafts, andmeans for reversing the direction of rotation of said connections. f

8. In a variable speed mechanism, a driving shaft, 'a driven shaft, acomposite gear composed of alternate concentric and eccentric gearsmounted on one of said shafts,

gear connectionebetween said composite gear .and the other shaft,including a shiftable gear, and means'for moving said shiftahle gear.transversely in time with the eccentricitv of the eccentric gears.

9. In a variable speed mechanism, a driving shaft, a driven shaft, a-composite gear composed of alternate concentric and eccentric gearsmounted on one of said 13o shafts, gear connections between saidcomposite gear and the other shaft, said connections including ashiftable gear in mesh with said com osite gear, a rock frame on whichsaid s hifrthble gear is mounted, and means for shifting said carlongitudinally.

' 10. In a variaEle speed mechanism, a shaft, a composite gear composedof alternate concentric and eccentric gears mountg ed on said shaft, asecond shaft, a gear mounted on said second shaft, a rock framejournaled on said second shaft and a gear on said .rock frame engagingboth of said previouslymentioned gears.

11. Ip' a variable ,speed mechanism, a

shaftz `a pcm'posite gear composed of alternate cogcehtric and-eccentricgears mounted on rsaid shaft, a .scondshaf t, .a gear on said secondshaft; af 'frame journaled on said i second shaftfa gear on said rockframe in mesh with both of said former gears and .movable longitudinallyof 'd com osite gear, and means for moving aid thir gear longitudinally.12. In a variable speed mechanism, 4 a

shaft, a `com osite gear composed of. alternate concentric and eccentricgears mounted on said shaft, a second shaft, a gear on said second shatrock frame journaled on said gg second sha a' gear on said rock frame inmesh with both of said former gears, means :for shifting said third gearlongitudinally,

and means operative by the longitudinal movement of said third gear formoving it transversely in time with the eccentricity of the eccentricgears.

, 13. In a variable speed 4mechanism, a shaft, a composite gear composedof alternate concentric and eccentric ears mounted on said shaft, asecond sha t, a gear on said shaft, a rock frame journaled on saidrsecond shaft, a: longitudinally movable gea' on said rock frame in meshwith both of said former gears, means for moving said 5 third gearlongitudinally, and means for holding it in the proper pltch relationwith said composite gear.

.14, In a variable Speed mechanism, a shaft, a composite gear composedof alter- 5. nate concentric and 'eccentric gears mounted on said shaft,a second shaft arranged parallel to said first named shaftpa gear onsaid second shaft, a rock frame journaled on said second shaft, a ear onsaid rock frame in mesh with bot of said former 1 ars, means forshifting said third gear ongitudinally to move it from one concentricgear over the intermediate eccentric ear to the next concentric ear,and'means 6g or rocking said frame to old said third gear in the properpitch relation with the eccentricgear. l

15. In a variable speed mechanism, a shaft, a composite gear composed ofalternate concentric and eccentric gears mounted on said shaft, a secondshaft arranged parallel thereto. a gear on said second shaft,

a rock frame {ournalcd on said second shaft,

a gear on sai( rock frame engaging both of said former gears, means formoving said third gear longitudinally, a fixed plate haw ing anirregular slot therein, and an arm rotatably secured to said third gearengaging insaid slot.

16. In a variable speed mechanism, a shaft, a composite gear composed ofalternate concentric and eccentric gears mounted on said shaft, a secondshaft parallel to said first named shaft, a gear on said second shaft, arock frame journaled on said shaft, 30 a longitudinally movable gear onsaid rock frame engaging both of said former gears, means for movingsaid third gear longitudinally, a plate on said rock frame having a slottherein parallel to said first shaft, a g5 xed plate below said platehaving an irregular slot therein and an arm rotatably secured to saidlongitudinally movable gear engaging in said slots.

17. In a variable speed mechanism, a shaft, a composite gear composed ofalternate concentric and eccentric gears mount ed on said shaft, asecond shaft, a gear on said shaft, a rock frame journaled on saidsecond shaft, a longitudinally movable gear on said frame engaging bothof said fo`rm"er gears, and means for moving said third gear in eitherdirection from either concentric gear to its adjacent concentric gear.

18. In;` a variable speed mechanism, a 13@ shaft, a plurality ofconnected gears mounted on said shaft, a second shaft, a gear on saidsecond shaft, a gear connecting the gears on said two shafts, a clutchconnecting the plurality of gears to the shaft on 195 which they aremounted and n clutch operative after the disengagement of said formerclutch. to couple the shafts directly.

19. In a variable speed mechanism. a driving shaft` a driven shaftnlined with said 119 driving shaft, gear connections including aplurality of connected gears between said shafts arranged to cause oneshaft to rotate at different speeds than the other shaft, and a sleevehaving clutch members at its-opposite ends adapted in one position toconnect said connections to one shaft. and in the other position todirectly couple said shafts.

20. In a variable speed mechanism, concentric and eccentric gears, partscoperat- 12g ing with said gears, said gears having coin cident portionswhich vary with respect to 'alincment according to the varying positionof the associated cope rating parts.

21. In a variable speed mechanism, a composite gear composed ofalternate concentric and eccentric gears, a cylindrical gear of the samelength as said composite gear arranged parallel thereto, and alongitudinally shiftable gear connection between said gears.

In a variable spinalI mechanism, a sh-aft, a composite gear composed ofalternate concentric and eccentritzgears mounted on said shaft, a secondshaft, a cylindrical gear of the same length as said composite earmounted on said second shaft. a rock tframe journaled on said secondshaft and a gear on said rock frame engaging both of said gears andmovable longitudinally with respect thereto.

E23. In a variable speed mechanism, a driving shaft, a driven shaft, asleeve mounted on one of said shafts, a composite `gear on said sleeve,gear connections between said composite gear and the other shaft, aclutch between said sleeve and the shaft on which it is mounted, aclutch between said gear connections and the other shaft, and means forcontrolling said clutches, said clutches being arranged so that oneclutch will be disengaged in advance of the other clutch.

24. In a variablespeed mechanism, a driving shaft, a driven shaft, asleeve mounted on one of said shafts, a composite gear composed ofalternate concentric and. eccentric gears on said sleeve, gearconnections between said` composite gear and the` other shaft, a clutchbetween said sleeve and the shaft on which it is mounted, a clutchbetween said gear connections and the other shaft, and unitary means forcontrolling said clutches, said 'clutches being arranged so that oneclutch will be 'disengaged in advance of the other clutch.

Q5. In a. variable speed mechanism, a driving shaftya driven shaft, asleeve mounted on one of said shafts, av composite gear on said sleeve,gear connections between said composite gear and the other shaft, aclutch between `said sleeve and the shaft on which it is mounted, aclutch between said gear connections and the othet shaft, a clutch fordirectly connecting said shafts, and means for moving said clutches.

26. In a variable speed mechanism, a driving shaft. a driven shaft, asleeve mounted on one of said shafts, a composite gear on said sleeve,gear connections between said composite gear and the other shaft, aclutch between said sleeve and the shaft on which it is mounted. aclutch between said gear connections and directly connecting saidshafts. and means for moving said clutches. said first two clutchesbeingl arranged so that one will disengage in a vancc of the other andthe third clutch arrangcdso that it; will engage after the first. twoclutches have disengaged.

2T. In a variable speed unich-.misma driving shaft, a driven sha ft, acomposite ,gear mounted on one of said shaft-s, gear connections betweensaid composite gear and the other shaft. the gear on said other shaftbcing movabl(` longitudinallysaid initial longitudinal movement servinglo discngagc the other shaft, a clutch for Said gear from saidlshal't, areversing gear adapted to be engaged by the 'further movement of saidgear, and means for connecting said sli-.ift and movable gear after saidgear has been moved into engagement with the reversing gear.

QS. Ina variable speed nu'cbanisnna driving shaft, a driven shaft. acomposite gear mounted on ont` of ,said shafts'. gear connectionsbetwccn said composite gear and the other shaft` the gear on the othershaft being movable longitudiinillv, a reversing gear adapted to beengaged b v the gear on the other shaft, and means for locking saidmovable gear against longitudinal movement in either of its positions.

Q9. In a variable s .leed mechanism, a driving?r shaft, a driven shaftin alinement therewith, and gear connections includin,"r a compositegear composed of alternate concentric and eccentric gears between saidshafts.

v30. In a variablespeed mechanism, a plurality of 'gears of differentdiameters, a part to be Shiftcd into engagement, with either gear. ashifting cam, and means for connecting the part to be shifted to theshifting cam, which means vary in connecting position according to thedifferent. positions of the part to be shifted, due to the differentdiameters of said gears.

31. In a variable speed mechanism. a driving shaft, a driven shaft inalincment therewith, gear connections between said shafts, saidconnections including a composite gear composed of alternate concentricand eccentric gears sleeved on one of said Shafts, and means forconnectingr the composite gear to the shaft on which it is sleeved.

32. In a variable speed mechanism, a driving shaft, a driven shaft inalinement therewith, gear connections between said shafts, saidconnections including a composite gear composed of alternate concentricand eccentric gears sleeved on one of said shafts and connected to saidshaft, means for disconnecting the sleeved gear from the shaft, andmeans for directly connecting said shafts.

33. In a variable speed mechanism. a driving shaft, a driven shaft inalinement therewith, gears of different diameters mounted on the dri.cnshaft, a third shaft. a gear on said shaft, gear connections between thedriving shaft and the third shaft, gear con .eetions between the gear onthe third shaft and any one of the gears on the driven shaft. said lastnamed ,gear connections` being movable longitudinally while incontinuous engagement. with the gear on thc third shaft..

3l. In a variable spi-ed irnAc-hanism. a drivingshaft. a driven .shaftalincd tlu-rz-wilh. gear connections between said shafts includingfacompos-itc gear composed of alternate concentric and eccentric gears.means for disconnecting thc gea r connections from ltl both of saidshafts, and means for directly coupling said shafts.

35. In a variable speed mechanlsm, a shaft, a composite gear composed ofalternate concentric and eccentric gears mounted on said shaft, a secondshaft` a cylindrical gear mounted on said second shaft, gear connectionbetween Jthat gear on the second shaft and saidcomposite gear, and meansfor moving the said gear connection longitudinally of the composite gearWhile maintaining connect`onwith the composite gear and the gear o thesecond shaft.

, on sai 36. In a variable speed mechanism, a shaft, ears of differentdiameters mounted shaft, a second shaft, a cylindrical gar on saidsecond shaft, gear connection tween the cylindrical gear and either ofthe gears on the first shaft, said connection being movable along thecylindrical gear, and means for maintaining said gear connection incontinuous engagement with said cylindrical gear.

37. In a variable speed mechanism, a shaft, a composite gear composed ofalternate concentric and eccentric gears mounted on said shaft, a secondshaft, a cylindrical ear on said second shaft, gear connection etweensaid composite gear and cylindrical gear, and means for moving theconnecting gear longitudinally of the composite and cylindrical gearswhile maintaining engagement with both o f said gears.

38. In a variable speed mechanism, a composite gear composed ofalternate concentric and eccentric' gears, and a longitudinally movablegear in continual engagement with said composite gear, said compositegear being so formed that the movable gear may be moved in eitherdirection with respect to the composite gear while maintainingengagement therewith regardless of the direction of rotation of thecomposite gear, and means for reversing said gears.

39. In a variable speed mechanism, a shaft, a composite gear mounted onlsaid shaft, a longitudinally movable gear engaging `said compositegear, a rotatable cam adapted to produce a step-by-step movement of saidlongitudinally movable gear, a slide connected to said gear" and pins insaid slide adapted to be moved singly into engagement with said cam,said cam being constructed to move the engaged pin out of engagement atthe end of the step movement.

40. .In a variable speed mechanism. a shaft. gears of differentdiameters mounted on said shaft, a second shaft, a gear on said secondshaft, a connecting gear between said gear on the second shaft andeither of the gears on the first named shaft, said connecting gear beingmovable from one to another of said first named gears. and means formaintaining the conhecting gear in con- (lll shaft, and means forreversing the direction of yrotation of all of said gears 42. In avariable speed mechanism, a driving shaft, a driven shaft alinedtherewith, gears of different. diameters mounted on one of said shafts,a third shaft, a gear on said third shaft connectin gear between saidgear on the thirdsha t and either of the said first named gears, saidconnecting gears being movable from one to another of said first namedgears while in continuous mesh with the gear on the third shaft, andmeans connecting said third shaft with the other of said first namedshafts.

43. In a variable speed mechanism, a shaft, gears of different diametermounted on said shaft, a second shaft, a gear on said second shaft, aconnecting gear between said latter gear and either of said first namedgears, said connecting" gear being movable from engagement from one ofsaid first named gears to another while maintainin continuous engagementwith said second named gear, and means for moving said connecting gear.

44. In a variable speed mechanism, a driving shaft, a driven shaft, asleeve c n one of, said shafts, a composite gear secured to said sleeve,a shifting cam, gear connections between said composite gear and theother shaft including a shiftable gear in mesh with said composite gear,and means arranged to connect said cam and shiftable gear to move saidgear longitudinally of the composite gear.

45. YIn a variable speed mechanism, a composite gear composed ofalternate concentric and eccentric gears, a gear engaging said compositegear and adaptedto be moved longitudinally thereof while in continualmesh with the gears of said composite gear a shifting cam rotatable intime with said composite gear having independent oppositcly directedgrooves thereon, a slide arranged adjacent said cam and connected tosaid movable gear and a plurality of pins in said slide, one half ofsaid pins being movable into one of said grooves and the other pinsbeing movable into the other of said grooves.

46. In a variable speed mechanism, a driving shaft, a driven shaft, asleeve on one of said shafts, a composite gear and a shifting camsecured to said sleeve, gear connections los between said composite gearand the other .shaft including a shiftable gear in mesh with saidcomposite gear, and means arranged to connect said cam and said movablegear to move said gear longitudinally 0f the composite gear.

47. In a variable speed mechanism, a composite gear composed ofalternate concentric and eccentric gears, a shaft arranged parallel tothe axis of said gear, a gear oln said shaft, a rock frame mounted onsaid shaft, a gear on said rock frame in engagement with said formergears, a shifting cam, a slide coperating with said\shifting cam, a

collar on said shaft connected to said slide,

and means connecting said collar andsaid third gear whereby the gear ismoved longitudinally in time with the slide.

48. In a variable speed mechanism, a driving shaft, a driven shaft, acomposite'gear on one of said shafts, gear connections Ybetween saidcomposite gear and the other shaft including a shiftable gear, a shafton which said shiftable gear is arranged, a shaft on which saidshiftable gear carrying shaft is mounted, a shifting cam, a slidecooperating therewith, a collar on said last named shaft connected tosaid shiftable gear; and-.means connecting said slide an collar.

49. In a vaniable speed mechanism, a oomposile gear composed ofalternate concentric and eccentric gears, a shiftable gear in mesh withsaid composite gear, a rock frame on which said shiftable gear ismounted, a shifting cam composed of alternate concentric and eccentricportions2 a groove in said cam having straight portions at the eccentric.faces of the cam and inclined portions at the concentric faces of thecam and having straight end portions, an arm attached to said rock frameand disposed adjacent to the face of said cam and a pin in said armadapted to be moved into said `groove.

50. In a variable speed gearing, a driving shaft, a driven shaft inalinement therewith, gear connections between said shafts, saidconnections including a gear movable .longitudinally along one of saidshafts, clutch members secured to opposite sidesl of said movable gear,clutch members secured to said shaft and adapted to he singly engaged byone of said first mentioned clutch members, and other gear connectionsadapted to be engaged by said movable gear. Y

In testimony whereof, I have hereunto set my hand at San Francisco,California, this 29th day of May, 1914.

JAMES ARNOTT.

In presence of H. G. PRos'r, J. B. GARDNER.

